Now that Santorum's out of the race, Romney has all but secured the nomination. Guardian US political columnist Ana Marie Cox and the National Review Online's Campaign Spot blogger Jim Geraghty will be taking your questions about the state of the GOP campaign and how the general election is shaping up.

<a href="http://www.coveritlive.com/mobile.php/option=com_mobile/task=viewaltcast/altcast_code=221d368202" >The US general election begins: Live Q&A with Ana Marie Cox and Jim Geraghty</a>

The webchat will start at 3pm ET (8pm UK time) and run for an hour, in partnership with the National Review Online.